It's made with shredded rice, salt and water.
You can make Teok-bokki with this rice cake.
If you want to know how to keep this for later, please check this video.
"How to make portions for Teok-bokki?"
https://www.youtube.com/watch?v=AVnUXqADmmk
* 떡볶이떡 소분하는 영상입니다^^